Oil separator and air conditioning unit

Abstract

The application provides an oil separator and an air conditioning unit. The oil separator comprises a shell, an air inlet pipe arranged on the shell, and at least two spiral separation assemblies arranged in parallel along the axial direction of the air inlet pipe, and a spiral flow channel is formed in each spiral separation assembly and communicates with the air inlet pipe. The oil separator and the air conditioning unit provided by the application can make the oil-gas mixture entering the shell flow spirally under the limitation of the spiral flow channel, so that the oil-gas mixture is separated under the action of centrifugal force, and the separation effect that cannot be achieved by the prior art is achieved. Moreover, since the oil-gas mixture is directly sent to the spiral flow channel through the air inlet pipe for separation, the disturbance of the oil-gas mixture to the liquid level of the oil storage area in the prior art can be avoided, and the oil return reliability of the oil separator is ensured.

Description

Technical Field

[0001] This invention relates to the field of separation equipment technology, and in particular to an oil separator and an air conditioning unit. Background Technology

[0002] In refrigeration and air conditioning systems, refrigerant oil is crucial for the safe and stable operation of the compressor, primarily serving functions such as cooling, lubrication, and sealing. During refrigeration unit operation, some refrigerant oil mixes with the refrigerant vapor discharged from the compressor in the form of oil droplets, thus participating in the system circulation. This participation of refrigerant oil in the system circulation negatively impacts heat exchanger performance, system efficiency, and the safe operation of the compressor. Studies show that when the circulating refrigerant oil content is 5%, the evaporator heat exchange decreases by 10%. When the oil content in the system increases by 1%, the system COP decreases by 2.5%. Furthermore, because the refrigerant oil remaining in the system after circulation can easily cause compressor oil shortage and malfunction. To solve this problem, an oil separator is typically installed between the compressor and the condenser. As one of the four key components of a screw compressor refrigeration unit, the oil separator's function is to separate and filter the high-temperature, high-pressure gaseous refrigerant and refrigerant oil mixture discharged from the compressor during the refrigeration cycle. Through the separation action of the oil separator, the refrigerant oil is separated from the refrigerant vapor, preventing refrigerant oil from participating in the system circulation. Simultaneously, the separated refrigerant oil is promptly delivered to the compressor to avoid compressor damage due to oil shortage.

[0003] In conventional vertical oil separator structures, the oil-laden gaseous refrigerant enters the oil separator space through the top inlet and disperses. Some large oil droplets initially flow downwards under gravity to the bottom and enter the return oil zone. Most are carried away by the airflow, impacting the cylinder and separating some droplets. The remaining small droplets are carried by the airflow around the cylinder and continue into the oil separator space. During the flow, under the influence of gravity and inertia, the lighter gaseous refrigerant flows towards the oil separator filter, while the smaller droplets gradually decrease in velocity and eventually settle to the bottom oil level zone. High gas velocity or an improperly designed flow field can cause the gaseous refrigerant to impact the refrigeration oil collected at the bottom of the container, leading to liquid level fluctuations, reduced oil return efficiency of the unit's return oil pipe, and affecting the stable operation of the level gauge or oil level mirror. Summary of the Invention

[0004] To address the technical problems of poor separation effect and unreliable oil return in oil separators, an oil separator and air conditioning unit are provided that utilizes multiple spiral separation components to make the oil-gas mixture flow in a spiral manner to improve separation efficiency and prevent the oil-gas mixture from directly impacting the liquid surface of the oil storage area.

[0005] An oil separator, comprising:

[0006] A housing, on which an air inlet pipe is provided;

[0007] At least two spiral separation components are arranged side by side along the axial direction of the intake pipe, and a spiral flow channel is formed within each spiral separation component, the spiral flow channel being connected to the intake pipe.

[0008] The spiral separation assembly includes an upper sealing plate, a lower sealing plate, and a guide plate. There is a first gap between the upper sealing plate and the lower sealing plate. The guide plate is spirally arranged within the first gap and forms the spiral flow channel within the first gap.

[0009] The lower sealing plate is provided with a first connecting port, and one end of the guide plate is located at the first connecting port to form the inlet of the spiral flow channel.

[0010] The first connecting port is located at the center of the lower sealing plate, and the central axis of the first connecting port is collinear with the central axis of the lower sealing plate. The inlet of the spiral flow channel is located at the center of the lower sealing plate, and the outlet of the spiral flow channel is located at the edge of the lower sealing plate.

[0011] The airflow direction at the outlet of the spiral channel is tangent to the inner wall of the shell corresponding to the outlet.

[0012] The upper sealing plate has a second gap with the inner wall of the housing, and the spiral flow channel communicates with the interior of the housing through the second gap; and / or, the lower sealing plate has a third gap with the inner wall of the housing, and the spiral flow channel communicates with the interior of the housing through the third gap.

[0013] The upper sealing plate is provided with a second connecting port, the air inlet pipe passes through the spiral separation assembly through the first connecting port and the second connecting port, and the air inlet pipe located within the first spacing is provided with a third connecting port, the air inlet pipe is connected to the spiral flow channel through the third connecting port.

[0014] The oil separator further includes a baffle plate disposed within the housing, which divides the interior of the housing into a separation chamber and an exhaust chamber. At least one spiral separation component is disposed within the separation chamber and at least one spiral separation component is disposed within the exhaust chamber. A fourth communication port is provided on the baffle plate, and the separation chamber communicates with the spiral flow channel of the spiral separation component within the exhaust chamber through the fourth communication port.

[0015] The housing is provided with an air inlet and an air outlet. The air inlet pipe extends into the housing through the air inlet. All the spiral separation components are arranged side by side at the air outlet and the air inlet. The lower sealing plate of the spiral separation component near the air outlet constitutes the partition.

[0016] The lower sealing plate is provided with an oil guide groove, which is located inside the spiral flow channel, and the oil guide groove is provided with an oil outlet at the outlet of the spiral flow channel.

[0017] An air conditioning unit includes the oil separator described above.

[0018] The oil separator and air conditioning unit provided by this invention utilize a spiral flow channel in the spiral separation component, allowing the oil-gas mixture entering the housing to flow spirally within the confines of the spiral flow channel. This enables the oil-gas mixture to be separated under the action of centrifugal force. Furthermore, since the size of the spiral flow channel is much larger than the height of the housing, it effectively increases both the flow distance of the oil-gas mixture and the effective separation distance compared to existing technologies, achieving a separation effect that existing technologies cannot achieve. Moreover, since the oil-gas mixture is directly sent to the spiral flow channel for separation through the air inlet pipe, it also avoids the disturbance of the oil surface in the oil storage area caused by the oil-gas mixture in existing technologies, ensuring reliable oil return from the oil separator. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of an oil separator provided in an embodiment of the present invention;

[0020] Figure 2 A cross-sectional view of an oil separator provided in an embodiment of the present invention;

[0021] Figure 3 A schematic diagram of the upper sealing plate with a second communication port provided in an embodiment of the present invention;

[0022] Figure 4 For having Figure 3 A schematic diagram of the spiral separation assembly of the upper sealing plate;

[0023] Figure 5 A schematic diagram of the upper sealing plate of the oil separator provided in an embodiment of the present invention, without a second communication port;

[0024] Figure 6 For having Figure 5 A schematic diagram of the spiral separation assembly of the upper sealing plate;

[0025] Figure 7 This is a schematic diagram of the lower sealing plate of the oil separator provided in an embodiment of the present invention;

[0026] Figure 8 This is a schematic diagram of the structure of the guide plate of the oil separator provided in an embodiment of the present invention;

[0027] Figure 9 This is a schematic diagram of the air inlet pipe of the oil separator provided in an embodiment of the present invention;

[0028] In the picture:

[0029] 1. Housing; 11. Inlet pipe; 2. Spiral separator assembly; 21. Spiral flow channel; 22. Upper sealing plate; 23. Lower sealing plate; 24. Guide plate; 25. Second spacing; 26. Third spacing; 27. Oil guide groove; 231. First connecting port; 221. Second connecting port; 111. Third connecting port; 3. Partition plate; 31. Fourth connecting port; 12. Separation chamber; 13. Exhaust chamber; 14. Inlet; 15. Exhaust port. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the invention.

[0031] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0032] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such terms can be used interchangeably where appropriate for the embodiments of the invention described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0033] It should be noted that in the description of this invention, terms such as "upper," "lower," "left," "right," "inner," and "outer," indicating directional or positional relationships, are based on the directional or positional relationships shown in the accompanying drawings. These are merely for ease of description and do not indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation; therefore, they should not be construed as limitations on this invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0034] Furthermore, it should be noted that, in the description of this invention, unless otherwise explicitly specified and limited, the terms "installation," "setting," and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection, an indirect connection through an intermediate medium, or a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0035] In actual operation, the high-temperature, high-pressure gaseous refrigerant discharged from the compressor carries some compressor oil particles into the oil separator. If this oil is carried by the airflow into the condenser or accumulates in the evaporator with the circulating medium, it not only reduces the heat exchange capacity of both units but also causes the compressor to be damaged due to insufficient lubrication, ultimately leading to the system's inability to operate safely and continuously. Therefore, to solve the problem of refrigerant oil separation and ensure the continuous safe operation of the system, an oil separator is used to separate the oil and gas in the fluid discharged from the compressor. The separated high-purity gaseous refrigerant enters the condenser, while the liquid refrigerant oil returns to the compressor using the pressure difference effect. However, the separation effect of existing oil separators is relatively poor. Therefore, such as... Figures 1 to 9 The oil separator shown includes: a housing 1, on which an air inlet pipe 11 is provided; at least two spiral separation components 2, all of which are arranged side by side along the axial direction of the air inlet pipe 11, and each spiral separation component 2 has a spiral flow channel 21 formed therein, which communicates with the air inlet pipe 11. Utilizing the spiral flow channel 21 in the spiral separation component 2, the oil-gas mixture entering the housing 1 can flow spirally within the confines of the spiral flow channel 21, allowing the oil-gas mixture to be separated under the action of centrifugal force. Furthermore, since the size of the spiral flow channel 21 is much larger than the height of the housing 1, compared with the prior art, the flow distance of the oil-gas mixture and the effective separation distance are effectively increased, achieving a separation effect that the prior art cannot achieve. Moreover, since the oil-gas mixture is directly sent to the spiral flow channel 21 for separation through the air inlet pipe 11, the disturbance of the oil surface in the oil storage area by the oil-gas mixture in the prior art can be avoided, ensuring reliable oil return from the oil separator. Figure 1 The arrows indicate the flow direction of the oil-gas mixture. Furthermore, the parallel direction of the spiral separator 2 is the central axis of the straight section of the intake pipe 11 extending into the housing 1.

[0036] In one embodiment, the spiral separation assembly 2 includes an upper sealing plate 22, a lower sealing plate 23, and a guide plate 24. A first gap exists between the upper sealing plate 22 and the lower sealing plate 23. The guide plate 24 is spirally arranged within the first gap, forming a spiral flow channel 21 within the first gap. By utilizing the upper sealing plate 22 and the lower sealing plate 23 to jointly enclose a fluid space with the first gap, and placing the guide plate 24 within the first gap, the top edge of the guide plate 24 is sealed to the upper sealing plate 22, and the bottom edge is sealed to the lower sealing plate 23. This ensures that the oil-gas mixture entering the first gap can only flow within the spiral flow channel 21 defined by the guide plate 24, guaranteeing that the oil-gas mixture can be separated under centrifugal force.

[0037] Among them, the guide plate 24 is a steel strip of a certain width. The size of the first spacing is equal to the width of the guide plate 24, which can ensure that the size of the spiral flow channel 21 is consistent, avoid the problem of unreliable separation of oil and gas mixture due to changes in flow area, and at the same time ensure the reliable connection between the upper sealing plate 22 and the lower sealing plate 23, and ensure the structural reliability of the spiral separation assembly 2.

[0038] Preferably, the central axis of the shell is a vertical straight line, and both the upper sealing plate 22 and the lower sealing plate 23 are horizontal plates. This allows the oil-gas mixture to be affected by gravity while flowing through the spiral channel 21, thus increasing the separation effect. It also enables the separated refrigeration oil to be automatically collected under the action of gravity.

[0039] In order to achieve the connection between the intake pipe 11 and the spiral separator assembly 2, the lower sealing plate 23 is provided with a first connection port 231. The intake pipe 11 can be connected to the first spacing through the first connection port 231, and one end of the guide plate 24 is located at the first connection port 231 to form the inlet of the spiral flow channel 21. The oil-gas mixture flowing in from the intake pipe 11 can directly enter the spiral flow channel 21 for separation under the action of the guide plate 24.

[0040] like Figure 2As shown, to maximize the length of the spiral channel 21, the first connecting port 231 is located at the center of the lower sealing plate 23, and the central axis of the first connecting port 231 is collinear with the central axis of the lower sealing plate 23. The inlet of the spiral channel 21 is located at the center of the lower sealing plate 23, and the outlet of the spiral channel 21 is located at the edge of the lower sealing plate 23. The oil-gas mixture entering the spiral channel 21 flows from the center of the spiral separation component 2 towards the inner wall of the shell 1. As the oil-gas mixture flows, the radius of the spiral channel 21 gradually increases, and the oil-gas separation effect gradually increases. Thus, it can start from separating larger oil droplets at the inlet of the spiral channel 21, gradually separating oil droplets with gradually decreasing diameters, until the outlet of the spiral channel 21, achieving the separation of oil droplets of different diameters or volumes, ensuring the separation effect of the oil-gas mixture, and achieving a separation effect that cannot be achieved by using a filter screen to filter oil droplets larger than the pore size of the filter screen in the prior art, further improving the separation effect of the oil separator. Optionally, the deflector 24 is in the shape of an Archimedean spiral.

[0041] Furthermore, the airflow direction at the outlet of the spiral channel 21 is tangential to the inner wall of the housing 1 corresponding to the outlet. This allows the oil-gas mixture discharged from the spiral channel 21 to flow further spirally along the inner wall of the housing 1, preventing the oil-gas mixture from instantly rising and affecting the exhaust effect of the exhaust port, and also preventing it from instantly falling and impacting the liquid surface of the oil storage area, thus affecting the oil return effect of the oil separator.

[0042] To facilitate the smooth discharge of the oil-gas mixture within the spiral flow channel 21, a second gap 25 is provided between the upper sealing plate 22 and the inner wall of the housing 1. The spiral flow channel 21 communicates with the interior of the housing 1 through this second gap 25. The oil-gas mixture separated within the spiral flow channel 21 flows into the housing 1 through the second gap 25. Since the exhaust port is located above the spiral separation assembly 2, i.e., above the upper sealing plate 22, the second gap 25 between the upper sealing plate 22 and the inner wall of the housing 1 ensures that the oil-gas mixture separated by the spiral flow channel 21 flows smoothly towards the exhaust port. This allows for the rapid discharge of the separated gaseous refrigerant from the oil separator, reducing the pressure impact of the oil separator on the gaseous refrigerant and ensuring the reliability of the oil separator.

[0043] Similarly, after the oil-gas mixture is separated by the spiral flow channel 21, some of the refrigerant oil will be separated within the spiral flow channel 21. Since the oil storage area is located at the bottom of the shell 1, that is, below the lower sealing plate 23 of the spiral separation assembly 2, a third gap 26 is provided between the lower sealing plate 23 and the inner wall of the shell 1 to ensure that the refrigerant oil can flow smoothly into the oil storage area. The spiral flow channel 21 is connected to the interior of the shell 1 through the third gap 26. The separated gaseous refrigerant can flow out through the third gap 26, and the separated refrigerant oil also flows through the third gap 26 and drips into the lower oil storage area under the action of gravity, ensuring that the refrigerant oil can flow smoothly into the oil storage area and ensuring reliable oil return of the oil separator. To further ensure reliable return of refrigerant oil in the spiral flow channel 21, an oil guide groove 27 is provided on the lower sealing plate 23. The oil guide groove 27 is located in the spiral flow channel 21, and the oil guide groove 27 has an oil drain port at the outlet of the spiral flow channel 21. The oil guide groove 27 is used to collect the refrigeration oil separated in the spiral flow channel 21, preventing the refrigeration oil in the spiral flow channel 21 from being entrained by the oil-gas mixture in the spiral flow channel 21 again, thus ensuring the separation effect. At the same time, it can also ensure that the refrigeration oil can flow out of the spiral flow channel 21 smoothly, ensuring the separation effect of the oil separator. The flow force of the refrigeration oil in the oil guide groove 27 can be the change in the depth of the oil guide groove 27. In the flow direction of the oil-gas mixture in the spiral flow channel 21, the depth of the oil guide groove 27 gradually increases, and the refrigeration oil can flow out of the oil guide groove 27 under the action of gravity. Alternatively, it can be flowed by the blowing of the oil-gas mixture flowing through the oil guide groove 27 and opening in the spiral flow channel 21. Although there is a problem of the oil-gas mixture entraining the refrigeration oil in the oil guide groove 27, it will be separated again as the oil-gas mixture flows. At the same time, it can reduce the processing difficulty of the lower sealing plate 23 and improve production efficiency.

[0044] Since multiple spiral separation components 2 are arranged side by side in the housing 1, the air intake pipe 11 needs to be connected to all spiral separation components 2. Therefore, the air intake pipe 11 needs to penetrate part of the spiral separation components 2. The upper sealing plate 22 is provided with a second connecting port 221. The air intake pipe 11 penetrates the spiral separation components 2 through the first connecting port 231 and the second connecting port 221. The air intake pipe 11 located within the first spacing is provided with a third connecting port 111. The air intake pipe 11 is connected to the spiral flow channel 21 through the third connecting port 111. At this time, all spiral separator components 2 can be connected to the intake pipe 11. The oil-gas mixture in the intake pipe 11 can provide an oil-gas mixture to the connected spiral separator components 2 through the third connecting port 111. The intake pipe 11 can pass through the spiral separator components 2 through the first connecting port 231 and the second connecting port 221. At this time, the edges of the intake pipe 11, the first connecting port 231, and the second connecting port 221 are sealed to ensure that the oil-gas mixture in the intake pipe 11 can completely flow into the spiral flow channel 21. It must be separated in the spiral flow channel 21 before flowing into the interior of the housing 1, and finally flowing through the interior of the housing 1 to the exhaust port for discharge, ensuring the reliable separation of the oil separator. That is, as shown in the figure. Figure 1 As shown in the figure, multiple spiral separation components 2 are sleeved on the air inlet pipe 11, and multiple third connecting ports 111 corresponding to the spiral separation components 2 are provided on the air inlet pipe 11. Furthermore, a plug is provided at the end of the air inlet pipe 11 to further prevent the air inlet pipe 11 from directly communicating with the inside of the housing 1, ensuring that the oil-gas mixture can be discharged through the exhaust port after being separated, thereby further ensuring the separation effect of the oil separator.

[0045] To further increase the separation efficiency of the oil separator, the oil separator also includes a baffle 3, which is disposed inside the housing 1 and divides the interior of the housing 1 into a separation chamber 12 and an exhaust chamber 13. At least one spiral separation component 2 is disposed in the separation chamber 12 and the exhaust chamber 13. The baffle 3 is provided with a fourth connecting port 31, through which the separation chamber 12 is connected to the spiral flow channel 21 of the spiral separation component 2 in the exhaust chamber 13. At this time, the oil-gas mixture entering through the intake pipe 11 will first pass through the spiral separation component 2 located in the separation chamber 12 for separation, and then flow into the interior of the separation chamber 12, and then flow into the exhaust chamber 13 through the fourth connecting port 31 on the baffle 3. Then, it will undergo secondary separation by passing through the spiral separation component 2 located in the exhaust chamber 13, further ensuring the separation effect of the oil separator.

[0046] The housing 1 is provided with an air inlet 14 and an exhaust outlet 15. The air inlet pipe 11 extends into the housing 1 through the air inlet 14. All the spiral separation components 2 are arranged side by side on the exhaust outlet 15 and the air inlet 14. Figure 1 As shown in the figure, the air inlet 14 is located at the lower part of the side wall of the housing 1, and the exhaust port 15 is located at the top of the housing 1. In order to reduce the structural complexity of the oil separator, the lower sealing plate 23 of the spiral separation assembly 2 near the exhaust port 15 constitutes the partition 3. That is, at this time, the lower sealing plate 23 of the spiral separation assembly 2 directly seals with the inner wall of the housing 1, thereby achieving internal separation of the housing 1 and ensuring that the oil-gas mixture in the separation chamber 12 can be completely separated by the spiral separation assembly 2 in the exhaust chamber 13, further ensuring the separation effect of the oil separator.

[0047] Specifically, such as Figure 1 As shown in the figure, there are four spiral separation components 2. Three of them are located in the separation chamber 12 to form a primary separation structure, while the other spiral separation component 2 is located in the exhaust chamber 13 to form a secondary separation structure. The intake pipe 11 enters the housing 1 from the side wall of the housing 1, bends at the central axis of the housing 1, and then passes through the three spiral separation components 2 below in sequence. The upper end of the intake pipe 11 is provided with a sealing element for sealing. Furthermore, a third connecting port 111 is provided at the connection between the intake pipe 11 and the three spiral separation components 2. The oil-gas mixture entering through the intake pipe 11 can flow into the spiral flow channel 21 of the corresponding spiral separation component 2 through the third connecting port 111, and after separation in the spiral flow channel 21, it is discharged into the separation chamber 12, completing the primary separation.

[0048] In the uppermost spiral separation assembly 2, the edge of the lower sealing plate 23 is sealed with the inner wall of the housing 1 to form a partition 3. At this time, all the oil-gas mixture in the separation chamber 12 can only enter the spiral separation assembly 2 for secondary separation. After being separated by the spiral separation assembly 2, it can flow into the exhaust chamber 13 and finally be discharged from the exhaust port 15.

[0049] like Figures 3 to 6 As shown, where Figure 3 The upper and middle sealing plate 22 is provided with a second connecting port 221. Figure 4 A spiral separation assembly 2 having a top sealing plate 22 with a second communication port 221; Figure 5 The upper and middle sealing plate 22 does not have a second connecting port 221. Figure 6 The spiral separation assembly 2 is an upper sealing plate 22 that does not have a second communication port 221.

[0050] An air conditioning unit includes the oil separator described above.

[0051] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of this patent should be determined by the appended claims.

Claims

1. An oil separator characterized by: The oil separator comprises a shell (1) provided with an air inlet pipe (11); at least two spiral separation assemblies (2) arranged in parallel along the axis of the air inlet pipe (11) and each having a spiral flow channel (21) formed therein and communicating with the air inlet pipe (11); and a partition plate (3) arranged in the shell (1) and separating the shell (1) into a separation chamber (12) and an exhaust chamber (13), at least one spiral separation assembly (2) being arranged in the separation chamber (12) and at least one spiral separation assembly (2) being arranged in the exhaust chamber (13), the partition plate (3) being provided with a fourth communication opening (31) through which the separation chamber (12) communicates with the spiral flow channel (21) of the spiral separation assembly (2) in the exhaust chamber (13). The spiral separation assembly (2) comprises an upper sealing plate (22), a lower sealing plate (23) and a flow guide plate (24), the upper sealing plate (22) and the lower sealing plate (23) have a first spacing therebetween, the flow guide plate (24) is arranged in the first spacing in a spiral shape and encloses the spiral flow channel (21) in the first spacing. The lower sealing plate (23) is provided with a first communication opening (231) at one end of the flow guide plate (24) to form an inlet of the spiral flow channel (21). The first communication opening (231) is located at the center of the lower sealing plate (23), and the central axis of the first communication opening (231) is collinear with the central axis of the lower sealing plate (23), the inlet of the spiral flow channel (21) is located at the center of the lower sealing plate (23), and the outlet of the spiral flow channel (21) is located at the edge of the lower sealing plate (23). The airflow direction at the outlet of the spiral flow channel (21) is tangent to the inner wall of the shell (1) corresponding to the outlet. The upper sealing plate (22) and the inner wall of the shell (1) have a second spacing (25), and the spiral flow channel (21) communicates with the inside of the shell (1) through the second spacing (25); and / or the lower sealing plate (23) and the inner wall of the shell (1) have a third spacing (26), and the spiral flow channel (21) communicates with the inside of the shell (1) through the third spacing (26). The upper sealing plate (22) is provided with a second communication opening (221), the air inlet pipe (11) penetrates the spiral separation assembly (2) through the first communication opening (231) and the second communication opening (221), and the air inlet pipe (11) located in the first spacing is provided with a third communication opening (111), and the air inlet pipe (11) communicates with the spiral flow channel (21) through the third communication opening (111).

2. The oil separator of claim 1, wherein: ​ 3. The oil separator of claim 1, wherein: ​ 4. The oil separator of claim 1, wherein: ​ 5. The oil separator of claim 1, wherein: The housing (1) is provided with an air inlet (14) and an exhaust outlet (15). The air inlet pipe (11) extends into the housing (1) through the air inlet (14). All the spiral separation components (2) are arranged side by side on the exhaust outlet (15) and the air inlet (14). The lower sealing plate (23) of the spiral separation component (2) near the exhaust outlet (15) constitutes the partition (3).

6. The oil separator of claim 1, wherein: The lower sealing plate (23) is provided with an oil guide groove (27), which is located inside the spiral flow channel (21), and the oil guide groove (27) is provided with an oil outlet at the outlet of the spiral flow channel (21).

7. An air conditioning unit characterized by: The oil separator includes any one of claims 1 to 6.

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